diff options
Diffstat (limited to 'src/compiler/scala/tools/nsc/settings/MutableSettings.scala')
-rw-r--r-- | src/compiler/scala/tools/nsc/settings/MutableSettings.scala | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/src/compiler/scala/tools/nsc/settings/MutableSettings.scala b/src/compiler/scala/tools/nsc/settings/MutableSettings.scala index 45b21f6126..7b4c55c2af 100644 --- a/src/compiler/scala/tools/nsc/settings/MutableSettings.scala +++ b/src/compiler/scala/tools/nsc/settings/MutableSettings.scala @@ -219,10 +219,10 @@ class MutableSettings(val errorFn: String => Unit) } def BooleanSetting(name: String, descr: String) = add(new BooleanSetting(name, descr)) - def ChoiceSetting(name: String, helpArg: String, descr: String, choices: List[String], default: String) = - add(new ChoiceSetting(name, helpArg, descr, choices, default)) - def ChoiceSettingForcedDefault(name: String, helpArg: String, descr: String, choices: List[String], default: String) = - ChoiceSetting(name, helpArg, descr, choices, default).withPostSetHook(sett => + def ChoiceSetting(name: String, helpArg: String, descr: String, choices: List[String], default: String, choicesHelp: List[String]) = + add(new ChoiceSetting(name, helpArg, descr, choices, default, choicesHelp)) + def ChoiceSettingForcedDefault(name: String, helpArg: String, descr: String, choices: List[String], default: String, choicesHelp: List[String]) = + ChoiceSetting(name, helpArg, descr, choices, default, choicesHelp).withPostSetHook(sett => if (sett.value != default) { sett.withDeprecationMessage(s"${name}:${sett.value} is deprecated, forcing use of $default") sett.value = default @@ -627,7 +627,7 @@ class MutableSettings(val errorFn: String => Unit) descr: String, val domain: E, val default: Option[List[String]] - ) extends Setting(name, s"$descr: `_' for all, `$name:help' to list") with Clearable { + ) extends Setting(name, s"$descr: `_' for all, `$name:help' to list choices.") with Clearable { withHelpSyntax(s"$name:<_,$helpArg,-$helpArg>") @@ -808,18 +808,33 @@ class MutableSettings(val errorFn: String => Unit) helpArg: String, descr: String, override val choices: List[String], - val default: String) - extends Setting(name, descr + choices.mkString(" (", ",", ") default:" + default)) { + val default: String, + val choicesHelp: List[String]) + extends Setting(name, + if (choicesHelp.isEmpty) s"$descr Choices: ${choices.mkString("(", ",", ")")}, default: $default." + else s"$descr Default: `$default', `help' to list choices.") { type T = String protected var v: T = default def indexOfChoice: Int = choices indexOf value - private def usageErrorMessage = f"Usage: $name:<$helpArg>%n where <$helpArg> choices are ${choices mkString ", "} (default: $default)%n" + private def choicesHelpMessage = if (choicesHelp.isEmpty) "" else { + val choiceLength = choices.map(_.length).max + 1 + val formatStr = s" %-${choiceLength}s %s%n" + choices.zipAll(choicesHelp, "", "").map({ + case (choice, desc) => formatStr.format(choice, desc) + }).mkString("") + } + private def usageErrorMessage = f"Usage: $name:<$helpArg> where <$helpArg> choices are ${choices mkString ", "} (default: $default).%n$choicesHelpMessage" + + private var sawHelp = false + override def isHelping = sawHelp + override def help = usageErrorMessage def tryToSet(args: List[String]) = errorAndValue(usageErrorMessage, None) override def tryToSetColon(args: List[String]) = args match { case Nil => errorAndValue(usageErrorMessage, None) + case List("help") => sawHelp = true; Some(Nil) case List(x) if choices contains x => value = x ; Some(Nil) case List(x) => errorAndValue("'" + x + "' is not a valid choice for '" + name + "'", None) case xs => errorAndValue("'" + name + "' does not accept multiple arguments.", None) |